Assignments
What the AI assignment checker gives you
Paste your assignment and press Analyze. What comes back is a written reading of the text: which phrasings look machine-made, where the sentence rhythm flattens out, what a marker might notice. What does not come back is a percentage, because the engine behind this page is instructed not to claim certainty about authorship or about which model wrote anything.
That is a deliberate difference from most tools with this name. It is free, 5 runs every rolling 24 hours, up to 12,000 characters a run, with no account. Your text is sent to our AI server to run the check, and there is no file upload, so paste rather than attach.
The problem, in plain terms
Why this AI assignment checker does not give you a percentage
A percentage looks like an answer and behaves like one, which is the problem. The numbers published for these tools do not agree with each other. Turnitin has claimed a false positive rate under 1%, while a Washington Post test reported figures as high as 50% on a smaller sample. A law library guide at the University of San Diego also reports that Turnitin's checker misses roughly 15% of AI-generated text, a trade the company accepts to keep false positives down.
Look closely and even the confident pages hedge. GPTZero prints 99% and 99.9% in large type, and the same page says results should not be used to punish or as the final verdict, and that no AI detector is 100% accurate. Both statements are true at once. A number cannot tell you who wrote something, so this tool does not print one.
How to
How to check an assignment for AI in three steps
Work on the draft before you submit it, and treat what comes back as editing notes rather than a grade.
- Step 1
- Paste one section at a time, up to 12,000 characters. Long documents are easier to act on in pieces than as a wall of notes.
- Step 2
- Read the findings against your draft and fix the specific sentences named, rather than rewriting everything at once.
- Step 3
- Do the two checks no tool can do for you: open every source you cited, and confirm each claim matches your own notes.
Why it matters
Detectors get people wrong, and not at random
This is the part worth knowing before you panic about a score someone else ran. The errors are not evenly spread. Research cited by the University of San Diego guide, drawing on Stanford's Human-Centered AI institute and a study by Liang and colleagues in Patterns, reports that students writing in English as a second language and neurodivergent students are flagged by these tools at higher rates than others.
Some institutions have acted on that. The University of Pittsburgh's teaching centre has disabled the AI detection tool in Turnitin and endorses no detector, noting that most of them have a high false positive rate and are more likely to misfire on non-native English speakers. If you have been flagged, that context is worth having.
The tells
What actually reads as machine-written in an assignment
Concrete beats abstract here. The checker on this site matches 17 named phrase patterns, and these five turn up in student work more than the rest.
- The empty hedge
- It is important to note that, it is worth mentioning that. Announcing information instead of giving it. Delete the phrase and the sentence improves.
- Connective stacking
- Moreover, Furthermore, Additionally opening one sentence after another. One is fine. Three in a paragraph is a pattern.
- Scene setting
- In today's rapidly evolving landscape, in an era of. An opener that would fit any essay on any subject, which is why it reads as filler.
- Vague importance
- Plays a crucial role, is key to. It claims something matters without saying what it does.
- Borrowed metaphor
- Tapestry, realm of, stands as a testament to. A small vocabulary that shows up far more in model output than in student writing.
The one definite check
Invisible characters copied out of a chat window
Everything above is a judgement call. This is not. Text copied from a chat interface can carry invisible characters that survive the paste: zero-width spaces, word joiners, a stray byte-order mark, non-breaking spaces that look exactly like ordinary ones.
The scanner on this site handles exactly 14 of them, in your browser, with no model involved. A zero-width space either is in your document or it is not, and removing it is a definite action with a definite result. It is the only part of this subject that has a yes or no answer, so it is worth running before you worry about anything softer.
Straight answer
Will this AI assignment checker tell me if I will be caught?
No, and nothing else will either. This tool does not predict what Turnitin, GPTZero or a departmental checker will report about your work, it is not affiliated with any of them, and it publishes no accuracy figure of its own because nothing here measures one.
The checks that do have definite answers are the ones worth your time. Open every citation and confirm the source exists and says what you attributed to it, because invented references are a real problem regardless of any detector and they are easy to find if you look. Read your assignment brief again and confirm you answered the question asked. Then check your own AI policy, because what you are allowed to use and what you have to declare is set by your institution, not by a tool.
In practice
Who uses an AI assignment checker, and what it is not for
This page is written for a student reading their own draft before handing it in. Common reasons: you used a model to help with an outline and want to know how much of its voice survived, English is not your first language and you have heard that gets flagged, or you wrote the thing yourself and want a second opinion on whether it sounds stiff.
It is not built for running someone else's work through, and it would be a poor tool for that anyway, since it returns observations rather than a verdict. If you are an instructor, the teaching centres cited above make a consistent recommendation: a detector result should not be the sole basis for a misconduct decision, and assignment design, clear policy and conversation do more than a score does.